I've got two different favourites! I really can't decide which one is the best, they're just so different ride experiences and I love them both!
Hurarakan Condor - Port Aventura
Huge intamin free fall tower with excellent theming! The ride lasts for very long and has got both sit down, stand up and tilt mode. A very impressive drop tower! On the downside it really isn't that intense..
The Golden Tower - Tivoli Gardens
An S&S turbo drop in the very center of Copenhagen city! The ride has decent hight (60m) and nice theming (it's golden!). I really prefer the intense drop of the S&S drop towers and I think the sound effects of the compressed air just before beeing shot down towards earth contributes a lot to the atmosphere! I especially like this turbo drop because it's theming and the fact that it feels a lot higher/scarier when it is situated in the middle of a metropolitan! On the downside it could have been a bit higher, but that's not really a big complaint.